61650166608 has 50 divisors (see below), whose sum is σ = 178433472074. Its totient is φ = 20550055104.

The previous prime is 61650166607. The next prime is 61650166637. The reversal of 61650166608 is 80666105616.

It can be written as a sum of positive squares in only one way, i.e., 47562375744 + 14087790864 = 218088^2 + 118692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650166601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23783491 + ... + 23786082.

Almost surely, 2^61650166608 is an apocalyptic number.

It is an amenable number.

61650166608 is an abundant number, since it is smaller than the sum of its proper divisors (116783305466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61650166608 is a wasteful number, since it uses less digits than its factorization.

61650166608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47569593 (or 47569578 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 61650166608 in words is "sixty-one billion, six hundred fifty million, one hundred sixty-six thousand, six hundred eight".